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<FONT color="green">001</FONT>    package org.hackystat.telemetry.analyzer.reducer;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.io.InputStream;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.util.Collection;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.util.Map;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.util.TreeMap;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.logging.Logger;<a name="line.7"></a>
<FONT color="green">008</FONT>    <a name="line.8"></a>
<FONT color="green">009</FONT>    import javax.xml.bind.JAXBContext;<a name="line.9"></a>
<FONT color="green">010</FONT>    import javax.xml.bind.Unmarshaller;<a name="line.10"></a>
<FONT color="green">011</FONT>    <a name="line.11"></a>
<FONT color="green">012</FONT>    import org.hackystat.telemetry.analyzer.model.TelemetryStreamCollection;<a name="line.12"></a>
<FONT color="green">013</FONT>    import org.hackystat.telemetry.analyzer.reducer.jaxb.ReducerDefinition;<a name="line.13"></a>
<FONT color="green">014</FONT>    import org.hackystat.telemetry.analyzer.reducer.jaxb.ReducerDefinitions;<a name="line.14"></a>
<FONT color="green">015</FONT>    import org.hackystat.dailyprojectdata.client.DailyProjectDataClient;<a name="line.15"></a>
<FONT color="green">016</FONT>    import org.hackystat.sensorbase.resource.projects.jaxb.Project;<a name="line.16"></a>
<FONT color="green">017</FONT>    import org.hackystat.utilities.logger.HackystatLogger;<a name="line.17"></a>
<FONT color="green">018</FONT>    import org.hackystat.utilities.stacktrace.StackTrace;<a name="line.18"></a>
<FONT color="green">019</FONT>    import org.hackystat.utilities.time.interval.Interval;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    /**<a name="line.21"></a>
<FONT color="green">022</FONT>     * Provides a singleton manager for telemetry reducers. <a name="line.22"></a>
<FONT color="green">023</FONT>     * <a name="line.23"></a>
<FONT color="green">024</FONT>     * @author Qin ZHANG, Philip Johnson<a name="line.24"></a>
<FONT color="green">025</FONT>     */<a name="line.25"></a>
<FONT color="green">026</FONT>    public class TelemetryReducerManager {<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>      /** The singleton. */<a name="line.28"></a>
<FONT color="green">029</FONT>      private static TelemetryReducerManager theInstance = new TelemetryReducerManager();<a name="line.29"></a>
<FONT color="green">030</FONT>      /** Maps reducer names to a data structure with information about them. */ <a name="line.30"></a>
<FONT color="green">031</FONT>      private Map&lt;String, TelemetryReducerInfo&gt; reducerMap = <a name="line.31"></a>
<FONT color="green">032</FONT>        new TreeMap&lt;String, TelemetryReducerInfo&gt;();<a name="line.32"></a>
<FONT color="green">033</FONT>      <a name="line.33"></a>
<FONT color="green">034</FONT>      /**<a name="line.34"></a>
<FONT color="green">035</FONT>       * Gets the singleton instance of this class.<a name="line.35"></a>
<FONT color="green">036</FONT>       * <a name="line.36"></a>
<FONT color="green">037</FONT>       * @return An instance of this class.<a name="line.37"></a>
<FONT color="green">038</FONT>       */<a name="line.38"></a>
<FONT color="green">039</FONT>      public static TelemetryReducerManager getInstance() {<a name="line.39"></a>
<FONT color="green">040</FONT>        return theInstance;<a name="line.40"></a>
<FONT color="green">041</FONT>      }<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>      /**<a name="line.43"></a>
<FONT color="green">044</FONT>       * Finds and defines built-in telemetry reducer functions. <a name="line.44"></a>
<FONT color="green">045</FONT>       * If the reducer.definitions.xml file cannot be found, or the file specifies<a name="line.45"></a>
<FONT color="green">046</FONT>       * a class that cannot be instantiated, then logging messages will the displayed but no<a name="line.46"></a>
<FONT color="green">047</FONT>       * errors will be thrown.<a name="line.47"></a>
<FONT color="green">048</FONT>       */<a name="line.48"></a>
<FONT color="green">049</FONT>      private TelemetryReducerManager() {<a name="line.49"></a>
<FONT color="green">050</FONT>        Logger logger = HackystatLogger.getLogger("org.hackystat.telemetry");<a name="line.50"></a>
<FONT color="green">051</FONT>        ReducerDefinitions definitions = null;    <a name="line.51"></a>
<FONT color="green">052</FONT>        try {<a name="line.52"></a>
<FONT color="green">053</FONT>          logger.info("Loading built-in telemetry reduction function definitions.");<a name="line.53"></a>
<FONT color="green">054</FONT>          //InputStream defStream = getClass().getResourceAsStream("impl/reducer.definitions.xml");<a name="line.54"></a>
<FONT color="green">055</FONT>          InputStream defStream = <a name="line.55"></a>
<FONT color="green">056</FONT>            TelemetryReducerManager.class.getResourceAsStream("impl/reducer.definitions.xml");<a name="line.56"></a>
<FONT color="green">057</FONT>          JAXBContext jaxbContext = JAXBContext<a name="line.57"></a>
<FONT color="green">058</FONT>          .newInstance(org.hackystat.telemetry.analyzer.reducer.jaxb.ObjectFactory.class);<a name="line.58"></a>
<FONT color="green">059</FONT>          Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();<a name="line.59"></a>
<FONT color="green">060</FONT>          definitions = (ReducerDefinitions) unmarshaller.unmarshal(defStream);<a name="line.60"></a>
<FONT color="green">061</FONT>        } <a name="line.61"></a>
<FONT color="green">062</FONT>        catch (Exception e) {<a name="line.62"></a>
<FONT color="green">063</FONT>          logger.severe("Could not find built-in telemetry reduction function definitions! " <a name="line.63"></a>
<FONT color="green">064</FONT>              + StackTrace.toString(e));<a name="line.64"></a>
<FONT color="green">065</FONT>          return;<a name="line.65"></a>
<FONT color="green">066</FONT>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        for (ReducerDefinition definition : definitions.getReducerDefinition()) {<a name="line.68"></a>
<FONT color="green">069</FONT>          String name = definition.getName();<a name="line.69"></a>
<FONT color="green">070</FONT>          try {<a name="line.70"></a>
<FONT color="green">071</FONT>            logger.info("Defining built-in telemetry reduction function " + name);<a name="line.71"></a>
<FONT color="green">072</FONT>            Class&lt;?&gt; clazz = Class.forName(definition.getClassName());<a name="line.72"></a>
<FONT color="green">073</FONT>            TelemetryReducer reducer = (TelemetryReducer) clazz.newInstance();<a name="line.73"></a>
<FONT color="green">074</FONT>            TelemetryReducerInfo reducerInfo =  new TelemetryReducerInfo(reducer, definition);<a name="line.74"></a>
<FONT color="green">075</FONT>            this.reducerMap.put(name, reducerInfo);<a name="line.75"></a>
<FONT color="green">076</FONT>          }<a name="line.76"></a>
<FONT color="green">077</FONT>          catch (Exception classEx) {<a name="line.77"></a>
<FONT color="green">078</FONT>            logger.severe("Unable to define " <a name="line.78"></a>
<FONT color="green">079</FONT>                + definition.getClassName() + ". Entry ignored. " + classEx.getMessage());<a name="line.79"></a>
<FONT color="green">080</FONT>            continue;<a name="line.80"></a>
<FONT color="green">081</FONT>          }<a name="line.81"></a>
<FONT color="green">082</FONT>        }<a name="line.82"></a>
<FONT color="green">083</FONT>      }<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>     <a name="line.85"></a>
<FONT color="green">086</FONT>      /**<a name="line.86"></a>
<FONT color="green">087</FONT>       * Invokes the telemetry reducer to perform computations and generate a TelemetryStreamCollection.<a name="line.87"></a>
<FONT color="green">088</FONT>       * <a name="line.88"></a>
<FONT color="green">089</FONT>       * @param reducerName The name of the reducer to be invoked.<a name="line.89"></a>
<FONT color="green">090</FONT>       * @param project The project which defines the scope of metrics to be used in the computation.<a name="line.90"></a>
<FONT color="green">091</FONT>       * @param dpdClient The DPD Client.<a name="line.91"></a>
<FONT color="green">092</FONT>       * @param interval The time interval.<a name="line.92"></a>
<FONT color="green">093</FONT>       * @param parameters Parameters passed to reducer implementation. In case a reducer does not<a name="line.93"></a>
<FONT color="green">094</FONT>       *        need any parameter, either null or an empty array may be passed.<a name="line.94"></a>
<FONT color="green">095</FONT>       * @return The resulting instance of &lt;code&gt;TelemetryStreamCollection&lt;/code&gt;. <a name="line.95"></a>
<FONT color="green">096</FONT>       * @throws TelemetryReducerException If anything is wrong.<a name="line.96"></a>
<FONT color="green">097</FONT>       */<a name="line.97"></a>
<FONT color="green">098</FONT>      public TelemetryStreamCollection compute(String reducerName, DailyProjectDataClient dpdClient,<a name="line.98"></a>
<FONT color="green">099</FONT>          Project project, Interval interval, String[] parameters) throws TelemetryReducerException {<a name="line.99"></a>
<FONT color="green">100</FONT>        TelemetryReducerInfo reducerInfo = this.reducerMap.get(reducerName);<a name="line.100"></a>
<FONT color="green">101</FONT>        if (reducerInfo == null) {<a name="line.101"></a>
<FONT color="green">102</FONT>          throw new TelemetryReducerException("Telemetry reducer " + reducerName + " not defined.");<a name="line.102"></a>
<FONT color="green">103</FONT>        }<a name="line.103"></a>
<FONT color="green">104</FONT>        return reducerInfo.getReducer().compute(project, dpdClient, interval, parameters);<a name="line.104"></a>
<FONT color="green">105</FONT>      }<a name="line.105"></a>
<FONT color="green">106</FONT>    <a name="line.106"></a>
<FONT color="green">107</FONT>      /**<a name="line.107"></a>
<FONT color="green">108</FONT>       * Determines whether a particular telemetry reducer is defined.<a name="line.108"></a>
<FONT color="green">109</FONT>       * <a name="line.109"></a>
<FONT color="green">110</FONT>       * @param reducerName Telemetry reducer name.<a name="line.110"></a>
<FONT color="green">111</FONT>       * @return True if the specified telemetry reducer is defined.<a name="line.111"></a>
<FONT color="green">112</FONT>       */<a name="line.112"></a>
<FONT color="green">113</FONT>      public boolean isReducer(String reducerName) {<a name="line.113"></a>
<FONT color="green">114</FONT>        return this.reducerMap.containsKey(reducerName);<a name="line.114"></a>
<FONT color="green">115</FONT>      }<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>      /**<a name="line.117"></a>
<FONT color="green">118</FONT>       * Gets telemetry reducer information by name.<a name="line.118"></a>
<FONT color="green">119</FONT>       * <a name="line.119"></a>
<FONT color="green">120</FONT>       * @param reducerName The name of the reducer.<a name="line.120"></a>
<FONT color="green">121</FONT>       * @return The telemetry reducer information, or null if the reducer is not defined.<a name="line.121"></a>
<FONT color="green">122</FONT>       */<a name="line.122"></a>
<FONT color="green">123</FONT>      public TelemetryReducerInfo getReducerInfo(String reducerName) {<a name="line.123"></a>
<FONT color="green">124</FONT>        return this.reducerMap.get(reducerName);<a name="line.124"></a>
<FONT color="green">125</FONT>      }<a name="line.125"></a>
<FONT color="green">126</FONT>    <a name="line.126"></a>
<FONT color="green">127</FONT>      /**<a name="line.127"></a>
<FONT color="green">128</FONT>       * Returns information about all defined TelemetryReducers. <a name="line.128"></a>
<FONT color="green">129</FONT>       * <a name="line.129"></a>
<FONT color="green">130</FONT>       * @return A collection of &lt;code&gt;TelemetryReducerInfo&lt;/code&gt; instances.<a name="line.130"></a>
<FONT color="green">131</FONT>       */<a name="line.131"></a>
<FONT color="green">132</FONT>      public Collection&lt;TelemetryReducerInfo&gt; getAllReducerInfo() {<a name="line.132"></a>
<FONT color="green">133</FONT>        return this.reducerMap.values();<a name="line.133"></a>
<FONT color="green">134</FONT>      }<a name="line.134"></a>
<FONT color="green">135</FONT>    }<a name="line.135"></a>




























































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